I believe that they deserve high income. Some criticize that it goes too far beyond decency. But it’ s worth paying.
First, reward for artistic play.
The world’s tennis top-ranked player-- Roger Federer.
His technical skill can be role model. He achieved ten Grand Slam men's singles titles. It is said that Federer may become the greatest player in history. His artistic play is beautiful. It’s no wonder that it fascinates young players and enhances technical improvement. Huge money is paid for artistic work. Let’s take art for example. $40 million for Gauguin, $90 million for Picasso. This sense against fine work should be applied to sports player.
Second, evaluated by the sponsor.
Let’s take Japanese baseball player – Daisuke Matsuzaka for example. The baseball club – Red Socks offered him $60 million. Obviously this price is based up on their own evaluation. The club is willing to pay for him to strengthen the team. As long as the clubs can afford to pay, it’s not big issue.